Fixed Scroll Suction Passage Steps to Cut Compressor Pressure Loss
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Solution Overview
Problem
Conventional methods struggle to form a flat and slope-shaped suction communication passage in a fixed scroll, leading to significant suction pressure loss in compressors.
Innovation Solution
The suction communication passage in the fixed scroll is designed with a step-like cross-sectional shape formed by multiple steps, which suppresses sudden changes in the flow path and can be easily manufactured using conventional processing methods like end mill machining.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a flat and slope-shaped suction communication passage is formed in the fixed scroll, then suction pressure loss is suppressed, but manufacturing difficulty increases
Solution Approach 1:
The suction communication passage is divided into multiple sections with different cross-sectional shapes. The first section has a flat cross-sectional shape to guide refrigerant flow smoothly, while the second section has a slope-shaped cross-sectional shape to further reduce pressure loss. This segmentation allows each section to be optimized for its specific function while remaining manufacturable using conventional end mill machining methods.
Solution Approach 2:
Different portions of the suction communication passage are given different cross-sectional shapes according to their specific functional requirements. The first section receives a flat cross-sectional shape to facilitate smooth flow entry, while the second section receives a slope-shaped cross-sectional shape to optimize flow characteristics and reduce pressure loss in that specific location.
2Loss of energy
If a flat and slope-shaped suction communication passage is formed in the fixed scroll, then suction pressure loss is suppressed, but processing complexity increases
Solution Approach 1:
The suction communication passage is segmented into multiple sections with distinct cross-sectional shapes. The first section features a flat cross-sectional shape and the second section features a slope-shaped cross-sectional shape. This segmentation enables conventional end mill machining to process each section independently, avoiding the need for complex multi-step processing while still achieving the desired flow optimization.
Solution Approach 2:
The passage is designed with locally optimized cross-sectional shapes at different positions. The flat cross-sectional shape at the first section and the slope-shaped cross-sectional shape at the second section are implemented through localized processing, allowing conventional machining methods to handle the overall complexity without requiring specialized equipment or processes.
Data Source
Figure 1
Figure 2A~2B
Figure 3~4
AI summary
The present application discloses a compressor 1 comprising: a fixed scroll 22 including a suction communication passage 40 that is formed so that refrigerant flowing through a suction pipe 12 is guided to a compression chamber 28. The suction communication passage 40 is formed so that the cross-sectional shape of the suction communication passage 40 includes a step-like portion 42 that is formed by multiple steps 44.